Azo dyestuffs containing phenolic coupling group

Abstract

Azo dyestuffs of the formula ##STR1## wherein R 1 represents hydrogen or in some cases alkyl, aralkyl, aryl or cycloalkyl, R 2 represents hydrogen or in some cases alkyl, alkenyl or aralkyl, R 3 represents, inter alia, hydrogen, alkyl, halogen or cyano and D represents the radical of a diazo component, are suitable for dyeing synthetic textile materials, in particular those made of polyethylene terephthalate. The scarlet-colored to blue dyeings obtained, in particular, with the preferred dyestuffs of the formula I, wherein D represents a o,o'-dicyanobenzene radical, are distinguished by good general fastness properties, good depth of color and a particularly clear color shade.

I claim: 
     
       1. Dyestuffs of the formula ##STR52## wherein X 1  =Cl, F, Br, CH 3 , CF 3 , C 1  -C 8  -alkoxycarbonyl, acetyl, benzoyl, methylsulfonyl- X 2  =H or CH 3     R 1  =benzyl, methylbenzyl, phenyl, chlorophenyl, C 2  H 4  OC 2  H 4  CN, C 2  H 4  OCOCH 3 , C 2  H 4  OCONHC 4  H 9 ,   R 2  =C 2  H 4  CN, benzyl, C 2  H 4  OC 2  H 4  CN, C 2  H 4  OCOCH 3 , C 2  H 4  OCONHC 4  H 9  or H.   
     
     
       2. An azo dyestuff according to claim 1 of the formula ##STR53## 
     
     
       3. An azo dyestuff according to claim 1 of the formula ##STR54## 
     
     
       4. An azo dyestuff according to claim 1 of the formula ##STR55## 
     
     
       5. An azo dyestuff according to claim 1 of the formula ##STR56## 
     
     
       6. An azo dyestuff according to claim 1 of the formula ##STR57## 
     
     
       7. An azo dyestuff according to claim 1 of the formula ##STR58## 
     
     
       8. An azo dyestuff according to claim 1 of the formula ##STR59##